refactor: 统一中文文案并简化组件结构，提升代码可读性

移除 chrome.i18n 后，将各功能页面、布局与工具模块的 UI 文案改为内联中文；
删除冗余注释与过度抽象（如 ToolCard、StatCard），精简 props 与状态管理；
同步优化 JsonTools、StorageCleaner、Timestamp、TestDataGenerator、Dashboard、
Base64Converter、RightClickRestorer、TextStatistics、TopBar、RouterProvider、
ThemeModeProvider 及生成器库与 utils 工具文件。

src/pages/Base64Converter/components/Base64ConverterSection.tsx

@@ -40,12 +40,12 @@ export default function Base64ConverterSection({ mode }: Base64ConverterSectionP
     decodedFileName,
     setCustomFileName,
     resetAll,
-    safeFileSelect,
+    handleFileSelect,
     maxFileSizeStr,
   } = useBase64Converter({ mode });
 
   const handleDirectionChange = (next: Base64ConvertDirection) => {
-    if (!next || next === direction) return;
+    if (next === direction) return;
     resetAll();
     setDirection(next);
   };
@@ -80,7 +80,7 @@ export default function Base64ConverterSection({ mode }: Base64ConverterSectionP
               e.preventDefault();
               setIsDragging(false);
               const file = e.dataTransfer.files[0];
-              if (file) safeFileSelect(file);
+              if (file) void handleFileSelect(file);
             }}
             onClick={() => fileInputRef.current?.click()}
             className={cn(
@@ -99,7 +99,7 @@ export default function Base64ConverterSection({ mode }: Base64ConverterSectionP
               hidden
               onChange={(e) => {
                 const file = e.target.files?.[0];
-                if (file) safeFileSelect(file);
+                if (file) void handleFileSelect(file);
               }}
             />
             {isLoading ? (
@@ -123,7 +123,7 @@ export default function Base64ConverterSection({ mode }: Base64ConverterSectionP
                   {formatBytes(info.size)} · {info.type}
                 </span>
                 <span className="text-[11px] font-medium text-primary/80 mt-1">
-                  {'点击或拖拽以替换文件'}
+                  点击或拖拽以替换文件
                 </span>
               </div>
             ) : (
@@ -158,17 +158,17 @@ export default function Base64ConverterSection({ mode }: Base64ConverterSectionP
             <div className="p-4 rounded-2xl bg-card border border-border shadow-sm flex flex-col space-y-3">
               <div className="flex justify-between items-center select-none">
                 <span className="text-[10px] font-bold uppercase tracking-wider text-muted-foreground/90">
-                  {'Base64 编码结果'}
+                  Base64 编码结果
                 </span>
                 <div className="flex gap-2">
                   <CopyButton
                     text={result.rawBase64}
-                    tooltip={'复制纯 Base64'}
+                    tooltip="复制纯 Base64"
                     className="h-6 px-2 rounded-md border text-[10px] font-bold"
                   />
                   <CopyButton
                     text={result.output}
-                    tooltip={'复制 Data URI'}
+                    tooltip="复制 Data URI"
                     className="h-6 px-2 rounded-md border text-[10px] font-bold"
                   />
                 </div>
@@ -186,14 +186,14 @@ export default function Base64ConverterSection({ mode }: Base64ConverterSectionP
               <div className="flex items-center justify-between font-mono text-[10px] text-muted-foreground/70 select-none pt-1">
                 <div className="flex gap-4 items-center tabular-nums">
                   <span>
-                    {'原始大小'}:{' '}
+                    原始大小:{' '}
                     <span className="font-semibold text-foreground/80">
                       {formatBytes(result.originalBytes)}
                     </span>
                   </span>
                   <span className="text-border/60">|</span>
                   <span>
-                    {'编码大小'}:{' '}
+                    编码大小:{' '}
                     <span className="font-semibold text-foreground/80">
                       {formatBytes(result.outputBytes)}
                     </span>
@@ -206,7 +206,7 @@ export default function Base64ConverterSection({ mode }: Base64ConverterSectionP
                   className="h-7 rounded-md text-muted-foreground hover:text-destructive text-[11px] gap-1 px-2"
                 >
                   <Trash2 className="w-3.5 h-3.5" />
-                  {'清空'}
+                  清空
                 </Button>
               </div>
             </div>
@@ -215,7 +215,7 @@ export default function Base64ConverterSection({ mode }: Base64ConverterSectionP
       ) : (
         <div className="flex flex-col space-y-4">
           <TextInputArea
-            placeholder={'输入需要解码的 Base64 或 data URI...'}
+            placeholder="输入需要解码的 Base64 或 data URI..."
             value={decodeInput}
             onChange={setDecodeInput}
             externalError={decodeError || undefined}

src/pages/Base64Converter/components/DecodeResultPaper.tsx

@@ -1,12 +1,3 @@
-/**
- * DecodeResultPaper
- *
- * FileMode 与 ImageMode 通用的 decode 结果展示组件。
- * 提取了二者 decode 输出区完全一致的结构：
- *   标题 → 可选预览（children）→ 文件信息 → 文件名输入 → 下载按钮
- *
- * FileMode 直接使用，ImageMode 通过 children 传入图片预览。
- */
 import { Download } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
@@ -14,19 +5,12 @@ import { Label } from '@/components/ui/label';
 import { formatBytes } from '@/utils/format';
 
 interface DecodeResultPaperProps {
-  /** 标题文案 */
   title: string;
-  /** 解码后推断的 MIME 类型 */
   mimeType: string;
-  /** 解码后 Blob 的大小（字节） */
   blobSize: number;
-  /** 当前文件名 */
   fileName: string;
-  /** 文件名变更回调 */
   onFileNameChange: (name: string) => void;
-  /** 下载按钮点击回调 */
   onDownload: () => void;
-  /** 可选的预览内容，ImageMode 用于渲染图片预览 */
   children?: React.ReactNode;
 }
 
@@ -41,31 +25,20 @@ export default function DecodeResultPaper({
 }: DecodeResultPaperProps) {
   return (
     <div className="p-4 rounded-xl bg-primary/10 border border-primary/30">
-      {/* 标题 */}
       <span className="block mb-2 text-xs font-bold text-muted-foreground">{title}</span>
 
-      {/* 可选预览内容（ImageMode 的图片） */}
       {children}
 
-      {/* 文件信息 */}
       <div className="flex gap-4 mb-3">
-        <span className="text-xs text-muted-foreground">
-          {'推断的 MIME 类型'}: {mimeType}
-        </span>
-        <span className="text-xs text-muted-foreground">
-          {'解码大小'}: {formatBytes(blobSize)}
-        </span>
+        <span className="text-xs text-muted-foreground">推断的 MIME 类型: {mimeType}</span>
+        <span className="text-xs text-muted-foreground">解码大小: {formatBytes(blobSize)}</span>
       </div>
 
-      {/* 文件名输入 */}
       <div className="mb-3">
-        <Label className="block text-xs font-medium text-muted-foreground mb-1">
-          {'解码后文件名'}
-        </Label>
+        <Label className="block text-xs font-medium text-muted-foreground mb-1">解码后文件名</Label>
         <Input value={fileName} onChange={(e) => onFileNameChange(e.target.value)} />
       </div>
 
-      {/* 下载按钮 */}
       <Button
         variant="default"
         onClick={onDownload}
@@ -73,7 +46,7 @@ export default function DecodeResultPaper({
         className="w-full rounded-lg font-bold"
       >
         <Download className="mr-2 h-4 w-4" />
-        {'下载'}
+        下载
       </Button>
     </div>
   );

src/pages/Base64Converter/components/TextMode.tsx

@@ -8,7 +8,7 @@ interface TextModeProps {
   onSwitchToImageMode?: () => void;
 }
 
-export default function TextMode({ onSwitchToImageMode }: TextModeProps = {}) {
+export default function TextMode({ onSwitchToImageMode }: TextModeProps) {
   const {
     input,
     setInput,

src/pages/Base64Converter/useBase64Converter.ts

@@ -93,16 +93,7 @@ export function useBase64Converter({ mode }: UseBase64ConverterProps) {
     [mode],
   );
 
-  const safeFileSelect = useCallback(
-    (file: File) => {
-      handleFileSelect(file).catch((err) => {
-        console.error(`Base64 [${mode}] pipeline crash:`, err);
-      });
-    },
-    [handleFileSelect, mode],
-  );
-
-  const decodePipeline = useMemo(() => {
+  const decodeResult = useMemo(() => {
     const cleanedInput = debouncedDecodeInput.replace(/^data:image\/[a-z+]+;base64,/i, '').trim();
     if (!cleanedInput) return { decoded: null, error: null };
 
@@ -118,8 +109,8 @@ export function useBase64Converter({ mode }: UseBase64ConverterProps) {
     }
   }, [debouncedDecodeInput]);
 
-  const decoded = decodePipeline.decoded;
-  const decodeError = decodePipeline.error;
+  const decoded = decodeResult.decoded;
+  const decodeError = decodeResult.error;
 
   const decodedFileName = useMemo(() => {
     if (customFileName) return customFileName;
@@ -144,7 +135,7 @@ export function useBase64Converter({ mode }: UseBase64ConverterProps) {
     decodedFileName,
     setCustomFileName,
     resetAll,
-    safeFileSelect,
+    handleFileSelect,
     maxFileSizeStr,
   };
 }

src/pages/Base64Converter/useTextMode.ts

@@ -4,7 +4,7 @@ import { useContextMenuData } from '@/utils/useContextMenuData';
 
 const IMAGE_DATA_URI_PATTERN = /^\s*data:image\//i;
 
-const ERROR_MESSAGE_TO_I18N: Record<string, string> = {
+const ERROR_MESSAGES: Record<string, string> = {
   'Invalid Base64 string': '无效的 Base64 字符串',
   'Input appears to be binary data (e.g. an image). Please use the Image tab instead.':
     '检测到二进制数据（如图像），请使用图像选项卡',
@@ -30,7 +30,7 @@ export function useTextMode() {
 
   useContextMenuData({ featureKey: 'base64Converter', onData: handleContextMenuData });
 
-  const conversionPipeline = useMemo(() => {
+  const conversion = useMemo(() => {
     const trimmed = debouncedInput.trim();
     if (!trimmed) return { output: '', error: null };
 
@@ -38,31 +38,26 @@ export function useTextMode() {
       if (direction === 'encode') {
         const result = textToBase64(debouncedInput);
         return { output: result.output, error: null };
-      } else {
-        const decoded = base64ToText(trimmed);
-        return { output: decoded, error: null };
       }
+      const decoded = base64ToText(trimmed);
+      return { output: decoded, error: null };
     } catch (e) {
       const message = e instanceof Error ? e.message : '';
-      const i18nKey = ERROR_MESSAGE_TO_I18N[message];
       return {
         output: '',
-        error: i18nKey || message || '转换失败',
+        error: ERROR_MESSAGES[message] || message || '转换失败',
       };
     }
   }, [debouncedInput, direction]);
 
-  const output = conversionPipeline.output;
-  const error = conversionPipeline.error;
+  const output = conversion.output;
+  const error = conversion.error;
 
   const placeholder =
     direction === 'encode' ? '输入需要编码为 Base64 的文本...' : '输入需要解码的 Base64 字符串...';
   const outputLabel = direction === 'encode' ? 'Base64 编码结果' : '解码文本结果';
 
-  const showImageHint = useMemo(
-    () => direction === 'decode' && IMAGE_DATA_URI_PATTERN.test(input),
-    [direction, input],
-  );
+  const showImageHint = direction === 'decode' && IMAGE_DATA_URI_PATTERN.test(input);
 
   const handleDirectionChange = (value: 'encode' | 'decode') => {
     if (value === direction) return;